"Barker Mifflin is back! Sort of. He fell into a hole--or more accurately, he rode a forty-foot chicken down into the depths of Snerbville. Will he be lost there forever, or will he finally solve the mystery behind Colossal Chemistry? With the help of his new pal, Tilda Huxley--who happens to be the size of a Barbie Doll, thanks to scientific experiments gone wrong--he might just have a shot at finding out the real reason everyone in his hometown is so tight-lipped about its secrets. But first he has to avoid getting shrunk himself, or worse, getting discovered by certain fuzzy creatures with a ferocious appetite for garbage ... or the next best thing."-- Provided by publisher.